experimenter bias

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Related to experimenter bias: Hawthorne effect
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Noun1.experimenter bias - (psychology) bias introduced by an experimenter whose expectations about the outcome of the experiment can be subtly communicated to the participants in the experiment
psychological science, psychology - the science of mental life
bias, prejudice, preconception - a partiality that prevents objective consideration of an issue or situation
References in periodicals archive ?
By tightly controlling procedures and observations, experimenters make sure that their data are as unaffected as possible by experimenter bias.
As such, there may have been an effect of experimenter bias on the outcome of the behavioral measure.
A number of conclusions drawn from the reviewed studies were unfounded because the experimenters inferred causation from correlation, lacked standardized measures, had poor sampling procedures, failed to control for threats to validity, had very limited assessment of anxiety, had experimenter bias, and had poor operationalization of religious constructs.
Psychologically meaningful and consistent patterns of results would also be expected if safeguards preventing experimenter bias (such as predetermination of study sizes, prespecification of statistical tests, data checking and so on) were lacking.